Event: Open Rapid-play

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Opponent Rating Result
Amrik J Singh 2013 0 - 1
Christopher D Lewis 1867 1 - 0
Amrik J Singh 2013 1 - 0
Christopher D Lewis 1867 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2140 = (7760 + 400 * (3 - 1)) / 4)

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